package com.qyoung.controller;

import com.qyoung.dao.UserDao;
import com.qyoung.dao.impl.UserDaoImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet(urlPatterns = "/testAJAXServlet")
public class testAJAXServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        resp.setContentType("text/html;charset=utf-8");
        UserDao dao = new UserDaoImpl();
        boolean name = dao.findByName(username);
        PrintWriter writer = resp.getWriter();
        if (name){
            writer.print("用户名已存在！");
        }else {
            writer.print("用户名可用");
        }
    }
}
